In 1970s South Boston, FBI Agent John Connolly (Edgerton) persuades Irish mobster James “Whitey” Bulger (Depp) to collaborate with the FBI and eliminate a common enemy: the Italian mob. The drama tells the story of this unholy alliance, which spiraled out of control, allowing Whitey to evade law enforcement, consolidate power, and become one of the most ruthless and powerful gangsters in Boston history.

Cooper directed “Black Mass” from a screenplay by Mark Mallouk and Jez Butterworth, based on the book by Dick Lehr and Gerard O’Neill. John Lesher, Brian Oliver, Scott Cooper, Patrick McCormick and Tyler Thompson produced the film, with Brett Ratner, James Packer, Peter Mallouk, Ray Mallouk, Christopher Woodrow, Brett Granstaff, Gary Granstaff, Phil Hunt and Compton Ross serving as executive producers.
The film also stars Dakota Johnson (“Fifty Shades of Grey”) as Lindsey Cyr, Whitey’s former girlfriend and mother of his only child; Julianne Nicholson (“August: Osage County”) as John Connolly’s wife, Marianne; and Adam Scott (ABC’s “Parks and Recreation”) as FBI Agent Robert Fitzpatrick. Rounding out the main cast are David Harbour (“End of Watch”), Brad Carter (HBO’s “True Detective”), W Earl Brown (“Draft Day”) and Corey Stoll (“The Bourne Legacy”).

The behind-the-scenes creative team was led by director of photography Masanobu Takayanagi (“Silver Linings Playbook,” “Out of the Furnace”), production designer Stefania Cella (“The Great Beauty”), Oscar-nominated editor David Rosenbloom (“The Insider”), and costume designer Kasia Walicka-Maimone (“Foxcatcher”).

Warner Bros. Pictures presents, in association with Cross Creek Pictures and RatPac-Dune Entertainment, a Cross Creek Pictures Production in association with Le Grisbi Productions, Free State Pictures and Head Gear Films, a Scott Cooper Film, “Black Mass.” Slated for release worldwide beginning September 18, 2015, the film will be distributed by Warner Bros. Pictures, a Warner Bros. Entertainment Company.